\begin{figure*}[htbp]
\includegraphics[width=\textwidth]{figs/Callback.pdf}
\caption{Illustration of the Python callback mechanism,
demonstrating the translation between a Python function call
and its corresponding pseudo C/C++ implementations
using either the CPython API or pybind11
(with the C++ namespace \texttt{pybind11} abbreviated
as \texttt{py}).}\label{fig:Callback-C-API-vs-pybind11}
\end{figure*}
